Machine for cutting compound curves



Aug. 14, 1928. 680,853

7 R. w. BROWN MACHINE FOR CUTTING COMPOUND CURVES Original Filed Doc. 29. 1922 SSheets-Sheet Aug.. 1-4, 1928. 1,680,853

R. w. BROWN MACHINE FOR CUTTING COMPOUND GURVESv Original Filed Dec. 29. 1922 3 Sheets-Sheet 2 Aug. 14, 1928.

R. W. BROWN MACHINE FOR CUTTING COMPOUND CURVES Original Filed Dec. 29. 1922 5 sheet5 sheet Patented Aug. 14, 1928.

UNITED STATES PATENT OFFICE.

BAY w. BROWN, 01 LOS ANGELES, CALIFORNIA, ASSIGNOR TO BARNEY OLDFIELD MANUFACTURING COMPANY, LOS ANGELES, CALIFORNIA, A CORPORATION OF nncnmnroa CUTTING conrounn canvas.

Original application filed December 29, 1922, Serial No. 609,717. Divided and this application filed March 29, 1926.

This invention. relates to the art of forming curved surfaces, and the, present appll- J cation is a division of application Ser. No.

609,717, filed Dec. 29, 1922, now Patent Num- 5 her. 1,580,006, of April 6, 1926, and reference .is made to the specification thereof as to the general purposeofthe type of machine forming the subject of invention herein disclosed.

An object of the invention is to provide a simple, substantial and practlcal machine for the accurate cutting of compound curved and other surfaces, and to provide for attachment and settin of templates for use in the cutting of di erent surfaces. \Vhile the machine may be efficient and useful in the cutting, for instance, of lens laps, its field of utility is unlimited in surface forming.

To that end, various modifications, adapta- 2o tions and embodiments may be resorted to within the spirit, scope and principle of the invention as it is hereclaimed.

In the drawings: Figure 1 is a plan of the machine organized to operate upon work having a compound curved face of arcs of such radii as to require use of templates in the action of the machine. I a

Figure 2 is' a side elevation looking toward the carriage of the machine set up in Fig, 1; parts of the machine being 11). section.

Figure 3is an end elevation of the machine looking in the direction of the arrow 14, Fig. 2, certain of the parts being in vertical section.

. The tool holder and the work holder of the said patent are designed to have a simple oscillatory motion and arecapable of action up to limits of radial adjustment for curved cuts, about the centersof oscillation. In the present embodiment, instead of using simple oscillating work and tool holders these latter are so designed and constructed that templates may be, employed to enable the cutting of the toolT, Fig.2, upon the work W. which I of surfaces of unlimited curve radius, and.

Serial No. 98,289. I

isheIdby thework post 50. The Work post, with its base 52, is turned to stand at right I angles tothe guides 1, and the turret is also turned at right angles to the guides 1 and is adapted to be locked or latched to the carriage 62 as by a locking pin 55?. This presents the feed screw 58 transversely to the latform so that its ratchet Wheel 60 is a apted to be automatically operated the manner hereinafter described. V V

The carriage 62 is unlocked from or free on its guideways 1 and is yieldingly pulled 1n one direction, away fromthe standard 100 as by a substantial contractile springlOS which is attached to a pin 104 secured to the 103-is resisted by a giventemplate 105 se-- cured to a portion of the base of the stand- 7 ard 100. The effective face of the template 105 is'engaged by a roller 106 carried by the outer end of an arm 107 which is secured to the'slide 53. The slide is transversely movable across the to of the turret 55 and this movement thereo is regulated by the action of the feed screw 58. The transverse path,

carriage. The retracting effort of the spring carriage will be producedby the transverse movement of the slide 53 to Which is attached the template engaging roller 106. The slide 53 has a transverse movement of its own on the locked turret 55 on. carriage 62 and this transverse movement is combined with the longitudinal movement of the carriage 62' so that the work will be carried in a path determined absolutely by the contour of the template 105 that isengaged by the roller 106, and it is obviousthat the operative face of the template 105 may be plane or curved with the curved face extending parallel to the axis of the roller 106. I

The tool T in this embodiment is shown as mounted in a tool holder 33 for longitudinal reciprocation, the tool. being secured in a sliding carrier 110 from one endof wh ch the tool proj'ects'to engage the work, wh1le the opposite end of the carrier 110 IS surrounded by an expansionspring 111 serving 'recipi'ocates a cross guide 116 formed'upon or attached to the back of the bracket 113. The cross guide 116 slidingly receives; a driving block 117 loosely mounted on a (lIlV- ing pin 118 which is carried by anadjust- I able pin-plate 119 adaptedto be clamped at' a desired position along the face of the drive arm 21. It will be seen that while the arm 21 is given an oscillatory movement, the drive pin 118 will also oscillate and will shift to and fro in the cross guide 116 which, therefore, is driven with a rectilinear movement and carries its bracket 113, in the present case vertically. This vertical movement of the bracket 113 reciprocates the tool holder 33 vertically withthe result that the roller 112 of the tool carrier 110 is run up and down the effective face of the template 102.

The combined movement of the tool carrier 110 as determined by the template 102 and the vertical movement of the tool holder 33* results in giving to the tool T the desired movement to produce the requisite cutfi'on the face of the work IV. The tool scribes arcs in a vertical plane and the transverse curvature is effected by the travel of the slide 53 transversely as to the path'of movement "of the tool T.

i To effect the automatic transverse feed of the slide 53 and the work W, suitable means are provided, inlthe present case shown as including a tappet pin 120 shown as attached to a lower portion of the bracket 113, and when the pin is in the lowermost position it is designedto engage an abutment 121 formed on or secured on'the' outertend of a lever arm 122 which'is secured on a rock shaft 123 mounted in suitable bearings 124. On the outer end of the rock shaft 123 is secured a short upwardly extending lever arm 125 to which-is connected a pawl 126 reaching over and engaging the ratchet wheel60, Fig. '1.

The pawl 126 is pulled intonormal yieldmg engagement with the ratchet wheel as by a spring 127. In this organization of the invention, the work W is set for initial cut by moving the work post to the front side of "the machine and applying the requisite template 105'to engage the tem late roller 106 which regulates the action 0 the the oscillations of the drive arm 21 serve to shift the tool in a vertical path which is differentiated ina horizontal direction by the template 102. As the drive arm 21 reciprocates,tl1e tappet, pin 120 becomes effective on the abutment 121 and the rock shalt 123 is oscillated with a consequent actuation of the feed shaft58', with the result that the slide 53 is moved transversely across the rmachine and effects the advance-of the Work W' during the intermittent action of the tool.

The arm 21 connects bya pin 20-to a link 18' \vhich'is operated by a lever 16 actuated by a motor concealed in'the column 6. In Fig. 3 is shown a lockin device 63 to set the standard 100, and in hig. 1 a hand wheel 61 is shown-to turn the feed screw 58 to back out the slide 53.

The lever arm 21 has atrunnion supported in bearing 23 which is closed at its. outer, end by'a cap 29. p

To adjust'the work W there is a plug 40 receiving a screw 12, mounted in a collar 44 in a post head box 45, andhaving a hand wheel 43. A clamp plate 47', on top of the box, has a clamp screw plug 40. A tenon 4:5 on" the bottom of the box positions the box on the post 50. i

What is claimed is:

1. In a machine for forming curved sur- 46 to bind down the l faces having-curves in planes. right angles" to each other, an oscillating arm, a station-t ary guide element, a tool holder mounted for reciprocation along said element by the said oscillating arm, and fixed means eng'afgeable by and for moving the'tool holder in a line at right'angles to andasa result of the reciprocating action and a work holder movable in, a path transverse to the action of said tool holder, andautomatically actuated by the latter.

2. In a machine for forming] curved surfaces havingcurves in planes at right angles to each other, an oscillating arm, a stationary guide element, a toolholder and a slide therefor mounted for reciprocation along saidelement by the said oscillating arm, and fixed means engaging and for moving the toolfholder on the slide in a line at right angles to the reciprocating action whereby to give along said means and a work holder movable in a path transverse to the action of said tool hotlder, and automaticallyactuatedby the ater. 3. In a machine for forming curved surfaces having curves in planesat right angles to each other, an oscillatingarm, a stationary guide element, a tool holder a slide, carrying said holder'mounted for reciprocation along" said element: by thesaidoscillab "mg arm, and means for moving the" tool (3311312151262. hen the machine is started,

holder in the slid'e in a line at" right angles to and concurrently with the reciprocating action, said means including a stationary template engaging and controlhng movem'ent of the tool holder'during its reciprocations and a work holder movable in a path transverse of the action of said tool holder,

and automatically actuated by the latter.

4. In a machine for forming curved surfaces having curves in planes at right angles for moving the tool holder in a line at right angles to the reciprocating action, a work holder for positioning work in a plane passing along the axis of oscillation of said arm, and means actuated by said tool holder for moving the work holder in a path transverse to the path of the operating tool holder.

5. In a machine for forming curved surfaces having curves in planes at right angles to each other, an oscillating arm, a stationary element,a tool holder mounted for reciprocation along said element, by the said oscillating arm, means for engaging and moving the tool holder in a line at right angles to the reciprocating action, a work holder for positioning work in a plane passing along the axis of oscillation of and operative intermittently with and by said arm, and means for engaging and moving the work holder in a curved path transverse to the path of the operating tool holder.

6. In a machine for formingcurved sur' faces having curves in planes at right angles to each other, an oscillating arm, a stationary element, .atool holder mounted for reciprocation along said element by the said oscillating arm, template means for engaging and moving the tool holder in a line at right angles to the reciprocating action, a work holder for positioning work in a plane passing along the axis of oscillation of said arm, and feed means for moving the work holder in a curved path transverse to the path of theoperating tool holder, said means including a master template for engaging and imparting to thework holder the curved movement.

7 A reciprocating tool holder including a tool carrier permitting movement of the tool in a line at right angles to its reciprocating movement, and a master template for effecting the movement of the carrier in the tool holder, and an oscillating means for actuating the holder and a work holder operative .by the carrier in a line at a right angle to that of the motion of the carrier.

8. A reciprocating tool holder including a tool carrier permitting movement of the tool in a line at right angles to its recipro-- cating movement, a mastertemplate for efv fecting and controlling the movement of the carrier in the tool holder by action of the holder in combination with a work holder for disposing work in the lane of opera tion of the tool carrier, and template controlled means for moving the work holder in a curved path transverse to the reciprocating movement of the tool holder;

9. A reciprocating tool holder including a tool carrier permitting movement of the tool in a line at right angles to its reciprocating movement, and a master template for controlling the movement of the carrier in the tool holder, in combination with a work holder for disposing work in the plane of operation of the tool, template controlled means for moving the work holder in a curved path transverse to the reciprocating movement of the tool holder, and automatically acting means controlled by the recip rocating tool holder for intermittently advancing the work holder to present successive lines of face to a tool in the carrier.

10. In a machine of the class described, a slidable work holding device and means for translating a rightline action thereof into a curved action, and a tool holder having a straight reciprocating motion and carrying a tool, and means for converting straight motion of the tool into a curved motion, and means cooperatively combining the said device and the tool holder and whereby the one controls the other. a

11. In a machine of the class described, an oscillating arm, a stationary guide, a member slidably mounted on said guide, an operating connection between said arm and said member to translate curved motion to straight motion, a carrier part slidable in said member and a template to control said part, a work post and a cross feed support therefor, and template means for controlling 

